How were the United States, Western Europe and Canada recreated?
Over 38 million elevation points from the U.S. geological survey data were used to insure precise elevations of mountain ranges and terrain. This creates a three-dimensional real world quality, and true-to-life viewing of your favorite mountains and terrain while flying. You can actually fly into the Grand Canyon and though valleys. Microsoft is based on a flat terrain model with objects placed on top of that terrain. Almost like setting polygon objects on a table top.
